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Finding the Fourth Proportional to 7,155.92, 9,870.18 and 6,915.08

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Solution

The fourth proportional to 7,155.92, 9,870.18 and 6,915.08 is: 9,537.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.92 : 9,870.18 = 6,915.08 : x
  2. Step 2: Convert to fraction form
    7,155.92/9,870.18 = 6,915.08/x
  3. Step 3: Cross multiply
    7,155.92x = 9,870.18 × 6,915.08
  4. Step 4: Simplify right side
    7,155.92x = 68,253,084.31
  5. Step 5: Solve for x
    x = 68,253,084.31/7,155.92
  6. Step 6: Final answer
    x = 9,537.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.